Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fa6ba9b7a14f9ec27b33002ae913c618c56d3b9c4c828eb1df2718ad5910d37' 
  AND token = 'Uky5E+m8YawF5XWNLCayoDkuIxHEzCygIgKS1YX64xg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}